| 1 | /* |
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| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
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| 3 | * operating system. INET is implemented using the BSD Socket |
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| 4 | * interface as the means of communication with the user level. |
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| 5 | * |
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| 6 | * Global definitions for the ARCnet interface. |
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| 7 | * |
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| 8 | * Authors: David Woodhouse and Avery Pennarun |
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| 9 | * |
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| 10 | * This program is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU General Public License |
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| 12 | * as published by the Free Software Foundation; either version |
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| 13 | * 2 of the License, or (at your option) any later version. |
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| 14 | */ |
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| 15 | |
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| 16 | #ifndef _LINUX_IF_ARCNET_H |
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| 17 | #define _LINUX_IF_ARCNET_H |
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| 18 | |
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| 19 | #include <linux/if_ether.h> |
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| 20 | #include <stdint.h> |
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| 21 | |
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| 22 | |
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| 23 | /* |
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| 24 | * These are the defined ARCnet Protocol ID's. |
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| 25 | */ |
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| 26 | |
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| 27 | /* CAP mode */ |
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| 28 | /* No macro but uses 1-8 */ |
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| 29 | |
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| 30 | /* RFC1201 Protocol ID's */ |
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| 31 | #define ARC_P_IP 212 /* 0xD4 */ |
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| 32 | #define ARC_P_IPV6 196 /* 0xC4: RFC2497 */ |
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| 33 | #define ARC_P_ARP 213 /* 0xD5 */ |
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| 34 | #define ARC_P_RARP 214 /* 0xD6 */ |
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| 35 | #define ARC_P_IPX 250 /* 0xFA */ |
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| 36 | #define ARC_P_NOVELL_EC 236 /* 0xEC */ |
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| 37 | |
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| 38 | /* Old RFC1051 Protocol ID's */ |
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| 39 | #define ARC_P_IP_RFC1051 240 /* 0xF0 */ |
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| 40 | #define ARC_P_ARP_RFC1051 241 /* 0xF1 */ |
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| 41 | |
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| 42 | /* MS LanMan/WfWg "NDIS" encapsulation */ |
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| 43 | #define ARC_P_ETHER 232 /* 0xE8 */ |
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| 44 | |
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| 45 | /* Unsupported/indirectly supported protocols */ |
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| 46 | #define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */ |
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| 47 | #define ARC_P_DATAPOINT_MOUNT 1 |
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| 48 | #define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */ |
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| 49 | #define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */ |
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| 50 | #define ARC_P_LANSOFT 251 /* 0xFB - what is this? */ |
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| 51 | #define ARC_P_ATALK 0xDD |
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| 52 | |
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| 53 | /* Hardware address length */ |
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| 54 | #define ARCNET_ALEN 1 |
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| 55 | |
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| 56 | /* |
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| 57 | * The RFC1201-specific components of an arcnet packet header. |
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| 58 | */ |
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| 59 | struct arc_rfc1201 |
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| 60 | { |
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| 61 | uint8_t proto; /* protocol ID field - varies */ |
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| 62 | uint8_t split_flag; /* for use with split packets */ |
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| 63 | uint16_t sequence; /* sequence number */ |
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| 64 | uint8_t payload[0]; /* space remaining in packet (504 bytes)*/ |
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| 65 | }; |
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| 66 | #define RFC1201_HDR_SIZE 4 |
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| 67 | |
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| 68 | |
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| 69 | /* |
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| 70 | * The RFC1051-specific components. |
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| 71 | */ |
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| 72 | struct arc_rfc1051 |
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| 73 | { |
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| 74 | uint8_t proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */ |
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| 75 | uint8_t payload[0]; /* 507 bytes */ |
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| 76 | }; |
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| 77 | #define RFC1051_HDR_SIZE 1 |
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| 78 | |
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| 79 | |
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| 80 | /* |
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| 81 | * The ethernet-encap-specific components. We have a real ethernet header |
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| 82 | * and some data. |
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| 83 | */ |
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| 84 | struct arc_eth_encap |
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| 85 | { |
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| 86 | uint8_t proto; /* Always ARC_P_ETHER */ |
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| 87 | struct ethhdr eth; /* standard ethernet header (yuck!) */ |
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| 88 | uint8_t payload[0]; /* 493 bytes */ |
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| 89 | }; |
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| 90 | #define ETH_ENCAP_HDR_SIZE 14 |
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| 91 | |
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| 92 | |
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| 93 | struct arc_cap |
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| 94 | { |
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| 95 | uint8_t proto; |
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| 96 | uint8_t cookie[sizeof(int)]; /* Actually NOT sent over the network */ |
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| 97 | union { |
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| 98 | uint8_t ack; |
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| 99 | uint8_t raw[0]; /* 507 bytes */ |
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| 100 | } mes; |
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| 101 | }; |
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| 102 | |
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| 103 | /* |
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| 104 | * The data needed by the actual arcnet hardware. |
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| 105 | * |
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| 106 | * Now, in the real arcnet hardware, the third and fourth bytes are the |
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| 107 | * 'offset' specification instead of the length, and the soft data is at |
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| 108 | * the _end_ of the 512-byte buffer. We hide this complexity inside the |
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| 109 | * driver. |
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| 110 | */ |
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| 111 | struct arc_hardware |
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| 112 | { |
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| 113 | uint8_t source, /* source ARCnet - filled in automagically */ |
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| 114 | dest, /* destination ARCnet - 0 for broadcast */ |
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| 115 | offset[2]; /* offset bytes (some weird semantics) */ |
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| 116 | }; |
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| 117 | #define ARC_HDR_SIZE 4 |
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| 118 | |
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| 119 | /* |
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| 120 | * This is an ARCnet frame header, as seen by the kernel (and userspace, |
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| 121 | * when you do a raw packet capture). |
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| 122 | */ |
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| 123 | struct archdr |
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| 124 | { |
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| 125 | /* hardware requirements */ |
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| 126 | struct arc_hardware hard; |
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| 127 | |
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| 128 | /* arcnet encapsulation-specific bits */ |
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| 129 | union { |
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| 130 | struct arc_rfc1201 rfc1201; |
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| 131 | struct arc_rfc1051 rfc1051; |
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| 132 | struct arc_eth_encap eth_encap; |
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| 133 | struct arc_cap cap; |
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| 134 | uint8_t raw[0]; /* 508 bytes */ |
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| 135 | } soft; |
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| 136 | }; |
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| 137 | |
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| 138 | #endif /* _LINUX_IF_ARCNET_H */ |
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